Update for 2015 country files #2980
Trend lines were not extented far enough #2980

In the case of Czech Republic, Improved + shared the line did not
expend until 2015 as it should have. This was due to improperly
computed min regression. A null value would override the actual min
regression, preventing extending the line.
Geoname had wrong name #2980
Some valid rules were reported as invalid #2980
Add global interface for discussions #2981
Dicussion notification via email #2981
Simplify email template to be mobile friendly #2973